高架桥受基坑工程施工影响的监测与安全评价

The monitoring and safety evaluation on viaduct affected by excavation engineering construction

地铁基坑工程开挖打破土体原始平衡,对周边环境产生影响。某地铁基坑工程紧邻高架桥开挖,为保证高架桥安全,必须针对高架桥设计专项监测方案,对其实施动态监测。通过对比高架桥安全阈值与高架桥实测值,表明高架桥桥墩沉降、两桥墩沉降差、倾斜值均在高架桥安全评价阈值范围内,认为基坑工程开挖对高架桥影响较小,高架桥整体安全。

Subway excavation breaks the original balance of the soil, which has impact on the surrounding environment. Taking a foundation pit of a subway closed to the viaduct excavation as the case, a special monitoring program shall be designed to ensure the viaduct security. By comparing the viaduct safety threshold and viaduct measured values, the piers of viaduct settlement, differential settlement of two piers, tilt values prove to be in the viaduct safety evaluation threshold, indicating the pit excavation will affect the viaduct little.